1998/06/12 by J. Blümlein, V. Ravindran, W. L. van Neerven
Physics and Astronomy · #hep-ph
published as Acta Phys.Polon. B29 (1998) 2581-2590 · 9 pages Latex + 1 style file all compressed by uufiles
arxiv created 1998/06/12 · arxiv updated 2009/11/30
The role of various symmetries in the evaluation of splitting functions and coefficient functions is discussed. The scale invariance in hard processes is known to be a guiding tool to understand the dynamics. We discuss the constraints on splitting functions coming from various symmetries such as scale, conformal and supersymmetry. We also discuss the Drell-Levy-Yan relation among splitting and coefficient functions in various schemes. The relations coming from conformal symmetry are also presented.